Sql查询找到缺失的月度支付

Question

我有一个SQL表，包含来自组成员的每月分期付款。

Member A : 10 (Monthly Fee), 
Member B : 15 (Monthly Fee) 

我的数据库表

我要寻找一个查询可以返回如下。 我需要得到结果作为PIC看到寻找失踪支付

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Answer 1

根据您的示例数据和期望的输出，你可以使用PIVOT，虽然我总是在演示文稿中的应用推荐给PIVOT您的数据，而比在数据库查询中。

USE 
tempdb 
GO 

IF OBJECT_ID('Payments', 'U') IS NOT NULL 
    DROP TABLE Payments 
GO 

CREATE TABLE Payments(
    Serial# INT NOT NULL PRIMARY KEY 
    ,Date DATE NOT NULL 
    ,MemberName VARCHAR(20) NOT NULL 
    ,Month VARCHAR(20) NOT NULL 
    ,MonthlyFee INT NOT NULL 
); 
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (1,'01/01/2017','Member A','January',10); 
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (2,'01/01/2017','Member B','January',15); 
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (3,'01/02/2017','Member A','February',10); 
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (4,'01/03/2017','Member B','March',15); 
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (5,'01/03/2017','Member A','March',10); 
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (6,'01/05/2017','Member A','May',10); 
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (7,'01/06/2017','Member A','June',10); 
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (8,'01/05/2017','Member B','May',15); 
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (9,'01/09/2017','Member A','September',10); 
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (10,'01/06/2017','Member B','June',15); 
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (11,'01/10/2017','Member A','October',10); 

SELECT 
    MemberName 
, January 
, February 
, March 
, April 
, May 
, June 
, July 
, August 
, September 
, October 
, November 
, December 

FROM 
(
    SELECT 
     MemberName 
    , Month 
    , MonthlyFee 

    FROM 
     Payments 
) AS P 

PIVOT 
(
    SUM(MonthlyFee) 
    FOR [Month] IN 
    (
     January 
    , February 
    , March 
    , April 
    , May 
    , June 
    , July 
    , August 
    , September 
    , October 
    , November 
    , December 
    ) 
) AS Pvt 

Answer 2

对于列名的动态列表，从mheptinstall的做法没有太大的不同

Declare @cols1 varchar(max) 
Declare @query nvarchar(max) 

Select @cols1 = stuff((select top (12) ','+QuoteName(DateName(MONTH,(DateAdd(MM, Row_Number() over(order by (Select NULL))-1, '2017-01-01')))) 
    from master..spt_values for xml path('')),1,1,'') 

Select @query = ' Select * from (
    Select MemberName, [Month], MonthlyFee from Payments) a 
    pivot(sum(MonthlyFee) for [Month] in ('+ @cols1 + ')) p ' 

Exec SP_ExecuteSql @query